read the first page dude on this thread then jumped to the end,,, I researched the tyre dep heavily only a matter of weeks ago as I just bought the car and it had noisy tyres on it with 2 diff Michelin tread patterns on,,, I came from a mk4 golf and my wife still runs her mk4 golf and I noticed the road noise straight away.
I put that down to going from 15s to 18s and 3mm tryes and wrong tread patterns but I knew no matter what I bought it would be noisier than my mk4 simply due to the bigger wheels.
I ran threads on here for quiet tyres but also wanted the best grip I could get,,, after a lot of research and a lot of help from other members I decided the best all round tyre out there was the eagle asym 2s and fitted mine about a month ago.
it is not your tyres dude,,,,, you may and I stress may find a marginally quieter tyre out there but it will sacrifice gripp or something else.
if your tyres have only done 4500 miles and are 7mm and 6mm then it aint them, I changed my pressures also from the guy who fitted them which was 34psi down to 30psi,,, I have not even checked what they are meant to be but the slightly softer ride helps.
im thinking if your pressures are ok, it may be your wheel allingment,,,, have you had that checked at all in the past ?
try driving on a flat road and take your hands of the wheel to see if your car drifts,,, try and get a flat road though as most uk roads are designed to pull to the laft for water dispersal.
other thing it could be and a bit of a long shot is you may just have a wheel that is out of balance or could even have a buckle,,,,, very very common an unbalanced wheel.
if I was you I would prob pop in somewhere and just get them to balance all your wheels and ask them if any are out,,, will take 10 minutes and cost about £15 or so,,, then check if your car is any straighter.
if you have a wheel out of balance you wont necessarily notice it by the car drifting as it may not effect it but an unbalanced wheel can and will contribute to road noise.
once this is all done then if you still have a prob then try and meet up with someone else from the forum with the same car and compare each others on the same road.
just my tuppence worth buddy